Retail sales of hi fi equipment including machines and software, compact disc players, cassette recorders, mini disc players, portable audio and video players, portable recorders, amplifiers, tuners, turntables, speakers, televisions, videos, parts, fittings and accessories for all the aforementioned goods and the provision of advice in the management of retail hi fi shops, negotiation of leasing arrangements, advice with regard to the fit out of shops, staffing, stocking and maintenance of equipment, purchasing policies, insurance arrangements and all other aspects of this class for the establishment of retail hi fi shops